Knife-sharpener.



F. C. ASCHBURNER.

KNIFE SHARPENER.

APPLICATION FILED DEC. 19, 1914.

Patented Feb. 22, 1916.

THE COLUMBIA PLMgoGRAPH co., WASH!NGTON, D. c.

FREDRICK C. ASCHBURNER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO JOHN D. POLLARD, OF CHICAGO, ILLINOIS.

KNIFE-SHARPENER.

Application filed December 19, 1914.

To all whom it may concern:

Be it known that I, FREDRIOK C. AsoH- BURNER, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Knife-Sharpeners, of which the following is a specification.

My invention relates to improvements in knife sharpeners, and has for its object, the provision of a simple and eflicient device of this character, by means of which knives may be readily sharpened.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawing forming a part of this specification, and in which,

Figure 1 is a perspective view of a knife sharpener embodying my invention, Fig. 2, a transverse section of the same, Fig. 3, a longitudinal medial section of the same, and Fig. 1, a plan view of a sheet metal blank from which the base of the sharpener is formed.

The preferred form of construction as illustrated in-the casing comprises a base member 5 made from a piece of sheet metal slit at the corners, as indicated in Fig. 4, and having its edges 6 bent downwardly to constitute bearing flanges therefor. Upwardly and outwardly inclined plates 7 are positioned on base member 5, said plates being formed of sheet metal and bent to form securing flanges 8 resting flat upon the top of base 5, said flanges being secured in position by means of tangs 9 struck up from base 5 and secured over the edges of flanges 8, as indicated. At its upper edge, each of the plates 7 is provided with tangs 10 struck outwardly therefrom and a guard 11 is provided with a flange 12 removably fitting between each set of tangs 10 and the corresponding plate 7, as indicated. Each of the guards 11 is also provided with a vertical portion 13 leading to the lower portion of an abrasive wheel or disk 14 having a trunnion 15 mounted in a bearing 16 carried by the corresponding plate 7 said bearing being outwardly and downwardly inclined so as to cause the face of the corresponding wheel 14 to assume an upward Specification of Letters Patent.

Patented Feb. 22, 1916.

Serial No. 878,148.

and outward inclination. A guard 17, in the form of a sheet metal plate bent into substantially U-form, is arranged between guard portions 13, as shown. Guard member 17 is provided at its bottom With inwardly extending lips 18 over which tangs 19, struck up from base 5, are secured as indicated, to fasten said guard in place. At the bottom sides of guard 17 are provided notches 20 to Permit free rotation of wheels 14 without contacting therewith. The guard 17 is so positioned and is of such a size as to form vertical knife guides 21 with the portions 13 of guards 11 leading to the lower portions of wheels 14.

In use, the knife is sharpened simply by drawing the same through the guides 21 with the lower edge in contact with the corresponding abrasive wheel 1 1. This causes rotation of the Wheel and grinding action on one side of the knife edge. To sharpen the other side of the knife edge, it is drawn through the other guide channel in contact with the other abrasive wheel. In this manner a few strokes of the lmife through the guide channels will serve to thoroughly sharpen the same.

While I have illustrated and described the preferred form of construction for car rying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. A knife sharpener comprising a base member; a pair of opposed abrasive wheels rotatably mounted on said base member with their inner faces upwardly and outwardly inclined; a guard for each of said wheels having a vertically positioned portion leading to the lower portion of said wheel; and a vertical guard arranged between said first mentioned guard and cooperating therewith to form vertical knife guides leading to the lower portion of said wheel, substantially as described.

2. A knife sharpener comprising a base member; a pair of upwardly and outwardly inclined supports secured to said base member; an abrasive wheel rotatably mounted in each of said supports with its inner face upwardly and outwardly inclined; a guard for each of said wheels having a vertically positioned portion leading to the lower portion of the wheel; and a vertical guard arranged between said guards and cooperating therewith to form vertical knife guides leading to the lower portions of said wheels, 13 substantially as described. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDRICK C. ASCHBURNER. Witnesses:

JOSHUA R. H. Por'rs, B. G. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

